S&S® Street Pro Engines

The S&S Street Pro engine was first introduced as part of the Tribute 145 finale in August of 2003 at the Broken Spoke Saloon in Sturgis, SD. A Street Pro bike built by S&S, G2 Motorsports and Gail's Harley-Davidson® was a result of George Smith's desire to build a big bore competition engine for 1999-up big twins and Brett Smith's desire to pay tribute to S&S Cycle's racings roots.

S&S and Star Racing offer a number of engine packages designed for competition in the AHDRA Street Pro Class ranging from 120" to 139" (the 120" is also AHDRA Pro Mod legal). All S&S Street Pro engines are 45° V-twins, built with the S&S TCSA crankcases including the S&S gear drive cams.

The S&S Street Pro Engines are available with rear motor mounts for either 1984-'99 chassis or for 1999-up chassis. Engines with the 1999-up style rear motor mount are intended for use with Harley-Davidson® transmission for 1999-up. Engines with the 1984-'99 style rear motor mount can be installed in any 1984-'99 style frame, providing the frame will accommodate the taller heads and Pro Stock style exhaust location.

S&S 133" Street Pro Engine

S&S 139" Street Pro Engine

Customer Bikes - Street Pro Engines

This Street Pro Engine from Star Racing powers up customer John Yeat's Bonneville race motorcycle. John got his start setting land speed records in 1970 at Bonneville with the Harley-Davidson Land Speed Record Team and a record of 265.492 mph.

More than 38 years later, John returned to the salt with a new bike built to go fast! After being referred to Star Racing, John and Star Racing General Manager, Derek Churchwell, decided that the S&S Street Pro Engine would be the best fit for his need for speed!

John and his team took the bike to the flats and were very pleased with how fantastic the bike handled. However, transmission problems kept them in the pits that year.

They are excited to be headed back to Bonneville with an updated Street Pro Engine and new body package to set a world land speed record!